IMO, there are 3 types of people who come here as a sponsored spouse:
#1) Wants to come to Canada very badly, will do everything possible to come, including marrying a Canadian and then planning on dumping him/her after the 2 year conditional PR.
#2) Wants to come to Canada very much, but does not want to do a MOC or deliberately dupe the sponsor. Wants to live in Canada with a loving spouse. But if given a choice between a spouse who is non-Canadian or a spouse who is Canadian (both spouses would be wonderful partners), this person would choose to be with the Canadian.
#3) Not interested in coming to Canada, only wants to come to Canada to be with their spouse, who prefers to live in Canada. Willing to live in either Canada or their home country.
I think the OP would fall under #2, she clearly wants to remain in Canada, despite just a short time in the country. I don't think it's a MOC just because they've been together for a long time, but at the same time, I also think the OP really wanted to live here, and has thought about it a lot, but also hoped her husband would be a good guy for her.
I don't agree with the reasoning behind not wanting to go back, she's a grown woman, doesn't need to live with the abusive mom's b/f, can go live on her own. If it was a war torn country, or a place like Somalia, then that's understandable. I don't know her specific circumstances, but I believe that the OP should've gone into this marriage/sponsorship because she wanted to live with her husband, not because she also hoped to get PR status. And now that the marriage is likely going to be dissolved, the purpose of the PR application (to be able to live with her husband), is defeated, and she should return home.
I know Canada is an awesome country and many people don't have the opportunity to be able to live her permanently, but look at it this way. If the OP got PR, divorced the husband, and therefore able to stay in the country, so she has this wonderful life in Canada, but if she thinks about it a bit more, she will realize she couldn't have gotten this PR without the abusive husband's help in the first place, so how would the OP feel about that? It's a bit ironic really. This is why I think the OP should return to her country after the divorce, but I strongly encourage her to apply to immigrate here through the other streams, that's really great because we need more skilled workers, live in caregivers, etc. Again, I don't think its an MOC, I think she just really wants to live here permanently, and if she does, she should explore the options CIC offers.